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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BYT]igt/kms_flip/wf_vblank-vs-modeset cause WARNING: CPU: 0 PID: 3716 at drivers/gpu/drm/i915/intel_dp.c:2653 intel_dp_link_down+0x5b/0x18d [i915]()"
href="https://bugs.freedesktop.org/show_bug.cgi?id=70570">70570</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BYT]igt/kms_flip/wf_vblank-vs-modeset cause WARNING: CPU: 0 PID: 3716 at drivers/gpu/drm/i915/intel_dp.c:2653 intel_dp_link_down+0x5b/0x18d [i915]()
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jinxianx.guo@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=87788" name="attach_87788" title="dmesg">attachment 87788</a> <a href="attachment.cgi?id=87788&action=edit" title="dmesg">[details]</a></span>
dmesg
System Environment:
--------------------------
Platform: BayTrail
kernel (drm-intel-next-queued)4cdb83ec9a72f741c75e20c8e412c505fc037f5f
Bug detailed description:
-----------------------------
Call Trace while running test igt/kms_flip/wf_vblank-vs-modeset
[ 352.383853] WARNING: CPU: 0 PID: 3716 at
drivers/gpu/drm/i915/intel_dp.c:2653 intel_dp_link_down+0x5b/0x18d [i915]()
[ 352.383901] Modules linked in: ip6table_filter ip6_tables iptable_filter
ip_tables ebtable_nat ebtables x_tables bnep bluetooth rfkill ib_iser rdma_cm
ib_addr iw_cm ib_cm ib_sa ib_mad ib_core ipv6 snd_hda_codec_realtek
snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm pcspkr
snd_page_alloc serio_raw snd_timer snd soundcore battery ac acpi_cpufreq
freq_table kvm_intel kvm uinput i915 drm_kms_helper drm video button dm_mirror
dm_region_hash dm_log dm_mod
[ 352.383905] CPU: 0 PID: 3716 Comm: kms_flip Not tainted
3.12.0-rc3_drm-intel-next-queued_4cdb83_debug_20131015_+ #941
[ 352.383908] Hardware name: Intel Corp. VALLEYVIEW B3 PLATFORM/NOTEBOOK, BIOS
BBAYCRB1.86C.0061.R22.1309171818 BBAY_IA32_R_V6122-MCU312 09/17/2013
[ 352.383918] 00000000 00000000 f0dfda20 c1738317 00000000 f0dfda38 c1030b48
f8df3ba2
[ 352.383927] f71f4000 f4f1b878 f55a7800 f0dfda48 c1030b73 00000009 00000000
f0dfda68
[ 352.383936] f8df3ba2 f72b0000 00000002 300c0004 f4f1b878 00000001 00000006
f0dfda94
[ 352.383938] Call Trace:
[ 352.383946] [<c1738317>] dump_stack+0x41/0x52
[ 352.383954] [<c1030b48>] warn_slowpath_common+0x66/0x7d
[ 352.383988] [<f8df3ba2>] ? intel_dp_link_down+0x5b/0x18d [i915]
[ 352.383993] [<c1030b73>] warn_slowpath_null+0x14/0x18
[ 352.384027] [<f8df3ba2>] intel_dp_link_down+0x5b/0x18d [i915]
[ 352.384063] [<f8df6945>] intel_dp_complete_link_train+0xd4/0x22e [i915]
[ 352.384113] [<f8df6b1b>] intel_enable_dp+0x68/0x73 [i915]
[ 352.384148] [<f8df6c34>] vlv_pre_enable_dp+0xf3/0x107 [i915]
[ 352.384181] [<f8de6031>] valleyview_crtc_enable+0x251/0x30f [i915]
[ 352.384215] [<f8de844e>] __intel_set_mode+0xe35/0xf1f [i915]
[ 352.384221] [<c106b6cf>] ? vprintk_emit+0x426/0x467
[ 352.384227] [<c107e69f>] ? trace_hardirqs_on_caller+0x127/0x17b
[ 352.384260] [<f8de9c6d>] intel_set_mode+0x17/0x2f [i915]
[ 352.384294] [<f8dea1ee>] intel_crtc_set_config+0x569/0x729 [i915]
[ 352.384298] [<c107e69f>] ? trace_hardirqs_on_caller+0x127/0x17b
[ 352.384322] [<f8cbcc89>] drm_mode_set_config_internal+0x3e/0x95 [drm]
[ 352.384330] [<f8d0142e>] drm_fb_helper_set_par+0x51/0x8d [drm_kms_helper]
[ 352.384336] [<c1319e09>] fb_set_var+0x29b/0x393
[ 352.384343] [<c132340a>] fbcon_blank+0x89/0x2a7
[ 352.384350] [<c136dbc2>] do_unblank_screen+0xe8/0x15c
[ 352.384354] [<c1366975>] vt_ioctl+0x4c1/0xedf
[ 352.384359] [<c13664b4>] ? complete_change_console+0xb5/0xb5
[ 352.384363] [<c135ecfc>] tty_ioctl+0x896/0x8e2
[ 352.384368] [<c135e466>] ? no_tty+0x21/0x21
[ 352.384373] [<c10fdd7c>] vfs_ioctl+0x20/0x2a
[ 352.384377] [<c10fe752>] do_vfs_ioctl+0x424/0x467
[ 352.384382] [<c107e69f>] ? trace_hardirqs_on_caller+0x127/0x17b
[ 352.384386] [<c107e6fe>] ? trace_hardirqs_on+0xb/0xd
[ 352.384390] [<c10f90ac>] ? final_putname+0x32/0x35
[ 352.384394] [<c10f90ac>] ? final_putname+0x32/0x35
[ 352.384398] [<c10f9212>] ? putname+0x23/0x2c
[ 352.384402] [<c10f0550>] ? do_sys_open+0x1b2/0x1bc
[ 352.384407] [<c10fe7e1>] SyS_ioctl+0x4c/0x73
[ 352.384412] [<c174439a>] sysenter_do_call+0x12/0x32
Reproduce steps:
----------------------------
1. ./mks_flip --run-subtest wf_vblank-vs-modeset</pre>
</div>
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